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United States Patent | 5,505,066 |
Baucom | April 9, 1996 |
An apparatus for alternately retaining a selected one of a pair of keys and releasing the other one of the pair of keys is provided. The retained key cannot be released until the other key is again disposed in a retained position. The apparatus includes a base plate having a pair of key receptacles, a slider assembly slidably mounted on the base plate, a visitor key having a pinion gear and a home key. The slider assembly includes a pair of key retaining slots for respectively retaining each key and a rack for driving engagement by the visitor key pinion gear for effecting sliding movement of the slider assembly in response to rotation of the visitor key pinion gear. A conventional key can be secured to the home key to control use of the conventional key through the selected release and retention of the visitor key and the home key.
Inventors: | Baucom; Larry H. (Mint Hill, NC) |
Assignee: | One Way Out, Inc. (Mint Hill, NC) |
Appl. No.: | 242469 |
Filed: | May 13, 1994 |
Current U.S. Class: | 70/389; 70/433; 70/434 |
Intern'l Class: | E05B 011/00 |
Field of Search: | 70/388,389,61,441,429,430,432-434,63 211/4,8,9 |
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537311 | Apr., 1895 | Schade | 70/411. |
882303 | Mar., 1908 | Eighler | 70/389. |
2064474 | Dec., 1936 | Hopkins | 70/389. |
2220786 | Nov., 1940 | Grainger | 70/262. |
2336936 | Dec., 1943 | Johnson | 70/61. |
2396759 | Mar., 1946 | Thieme | 70/265. |
2568206 | Sep., 1951 | Seaman et al. | 70/388. |
2894082 | Jul., 1959 | Collotta | 70/389. |
3095558 | Jun., 1963 | Crudgington et al. | 70/389. |
3154938 | Nov., 1964 | Cohen | 70/134. |
3391260 | Jul., 1968 | Messera | 70/388. |
3553988 | Jan., 1971 | Fitzgerald | 70/433. |
3774227 | Nov., 1973 | Smilgys | 70/433. |
4472952 | Sep., 1984 | Hollowell, Jr. | 70/61. |
4559796 | Dec., 1985 | DeForrest, Sr. | 70/434. |
4567741 | Feb., 1986 | Trempala | 70/389. |
4591852 | May., 1986 | Brod | 70/433. |
4641509 | Feb., 1987 | Batchelor et al. | 70/388. |
4753092 | Jun., 1988 | Mercer | 70/389. |
5020347 | Jun., 1991 | Logan | 70/389. |
5062670 | Nov., 1991 | Grossman | 70/434. |
5372021 | Dec., 1994 | Smith | 70/63. |
Foreign Patent Documents | |||
2616944 | Dec., 1988 | FR | 211/9. |
2213342 | Sep., 1973 | DE. | |
1500003 | Feb., 1978 | GB | 70/389. |
8901673 | Feb., 1989 | WO | 70/433. |